im running a 1985 camaro z28 carbed, whan the engine is warm the oil pressure drops to 0 and when im driving it moves up to 10.what could be the problem? and my oil pan leaks.

 

How many miles? Hard miles can wear those rod and main bearings down. When they get too much clearance they "bleed off" the oil pressure back to the pan.

Why does your oil pan leak? Check your PCV to make sure you are not pressurizing the crankcase.

 

its has around 89,000 and when i bought the car the oil was black, the blackest ive ever seen in a engine,so i change the oil and about a month ago the oil turned black again(i bought the car less than two months). i think the oil pan gasket leaks. and it lacks power.

 

Change the oil sending unit and try checking the pressure directly with a gauge on the sending unit tap. I doubt your oil pressure is that low.